US7098551B2 - Wind power installation with contactless power transmitter - Google Patents
Wind power installation with contactless power transmitter Download PDFInfo
- Publication number
- US7098551B2 US7098551B2 US10/493,798 US49379804A US7098551B2 US 7098551 B2 US7098551 B2 US 7098551B2 US 49379804 A US49379804 A US 49379804A US 7098551 B2 US7098551 B2 US 7098551B2
- Authority
- US
- United States
- Prior art keywords
- rotor
- wind power
- generator
- power installation
- stator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
- H02P9/26—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices
- H02P9/30—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices using semiconductor devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K19/00—Synchronous motors or generators
- H02K19/16—Synchronous generators
- H02K19/26—Synchronous generators characterised by the arrangement of exciting windings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2220/00—Application
- F05B2220/70—Application in combination with
- F05B2220/706—Application in combination with an electrical generator
- F05B2220/7064—Application in combination with an electrical generator of the alternating current (A.C.) type
- F05B2220/70644—Application in combination with an electrical generator of the alternating current (A.C.) type of the asynchronous type, i.e. induction type
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2101/00—Special adaptation of control arrangements for generators
- H02P2101/15—Special adaptation of control arrangements for generators for wind-driven turbines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Definitions
- the invention concerns a wind power installation for producing a sinusoidal ac voltage comprising a generator having a generator rotor and a generator stator, a rotor unit with rotor blades which is connected to the generator rotor, and power transmission means for the transmission of electrical power from the non-rotating part of the wind power installation to the rotor unit.
- U.S. Pat. No. 5,770,909 describes a synchronous machine for electrically operated vehicles, with which the power of the generator is to be optimised for all travel conditions, in particular over a rotary speed range of from zero to several thousand revolutions per minute.
- the object of the present invention is to provide an improved way of transmitting the electrical power from the non-rotating part of the wind power installation to the rotating part.
- the power transmission means have an asynchronous machine whose stator is arranged at the non-rotating part of the wind power installation and whose rotor is arranged at the rotating part for contactless transmission of electrical power to the rotating part and that arranged in the non-rotating part of the wind power installation is an inverter for producing an ac voltage having a periodic voltage pulse for feeding the stator of the asynchronous machine.
- the invention is based on the realisation that mechanical problems due to friction which occurs can be avoided by contactless transmission of the electrical power.
- An easy way of doing that is represented by the asynchronous machine which is proposed in accordance with the invention and whose rotor is connected to the rotating part of the wind power installation, preferably to the rotating hub, while the stator thereof is connected to the non-rotating part of the wind power installation, that is to say the machine carrier. Due to a relative movement therefore, as between the rotor and the rotating stator field of the asynchronous machine, an electrical field is induced in the rotor windings and in that way a voltage is produced in the rotor windings. In that situation the asynchronous machine is operated in a generator mode. The ac voltage induced in the rotor windings can then be further processed with suitable further means for use for the desired purpose in the rotating part of the wind power installation.
- the arrangement proposed in accordance with the invention for the contactless transmission of electrical power suffers from losses to a substantially lesser degree and is wear-free.
- the noise level generated is drastically reduced, compared to the known use of slip rings.
- the invention is preferably used in an electromagnetically excited synchronous generator in order there to derive a direct current as an exciter current for the rotor of the synchronous generator from the electrical power transmitted by the asynchronous machine.
- a suitable rectifier in the rotating part of the wind power installation, wherein in a further embodiment an LC filter can be connected on the input side thereof in order to compensate for reactions of the pole wheel of the synchronous machine, for example in the harmonics range.
- At least one further rectifier with which a dc voltage or also a direct current can be produced in order to supply further units on the rotor unit of the wind power installation with electrical power.
- a further rectifier with which a dc voltage or also a direct current can be produced in order to supply further units on the rotor unit of the wind power installation with electrical power.
- provided for blade angle adjustment of the individual rotor unit blades are electric motors which are to be supplied with a dc voltage. That supply is afforded in a simple manner in accordance with the invention.
- an inverter with which an ac voltage is generated to feed the stator of the asynchronous machine provided in accordance with the invention, for power transmission purposes.
- That inverter preferably generates an ac voltage at a frequency of about 400 to 600 Hz.
- regulation of the exciter current of the rotor of the generator can even be effected in dependence on the speed of rotation and the electrical power of the generator, by means of the inverter.
- the amplitude of the exciter current for the pole wheel of a synchronous generator can advantageously be regulated by the Inverter.
- the dc voltage present For many purposes within the rotor unit of the wind power installation, it is necessary for the dc voltage present to be as constant as possible. For that purpose, besides a rectifier, it is also possible to provide a capacitor which also additionally smoothes the output voltage of the rectifier. In order repeatedly to charge up that capacitor to the peak value, it can therefore be provided that the inverter periodically produces a voltage pulse. At the same time the capacitor serves as an intermediate storage device in order to provide sufficient electrical power, even in the event of failure of the current supply, at least for an emergency adjustment procedure.
- the asynchronous machine is advantageously operated at a frequency of 400 to 600 Hz and as there is an air gap from the primary winding to the secondary winding, the asynchronous machine has a very high reactive current requirement.
- That reactive current in accordance with the invention can be provided if connected on the input side of the stator of the asynchronous machine is an LC filter for setting the reactive current of the current fed to the stator.
- FIG. 1 shows a circuit diagram of the solution according to the invention
- FIG. 2 shows the configuration of the voltage of an inverter for feeding the asynchronous machine.
- the circuit diagram in FIG. 1 shows the solution according to the invention for contactlessly transmitting electrical power from the non-rotating part of the wind power installation to the rotating part.
- an inverter 1 which generates an ac voltage at a frequency of 400 to 600 Hz, preferably about 500 Hz.
- ac voltage produced by the inverter 1 and smoothed by means of the reactor chokes 2 is thus fed into the non-rotating stator 5 of the asynchronous machine 4 .
- stator field which rotates in the stator windings
- an electrical field is induced in the secondary windings of the rotor 6 by virtue of the relative movement between the rotor and the stator field and thus a voltage is produced in the stator windings.
- the rotating stator 6 is mechanically connected to the hub of the wind power installation.
- the electrical power can thus be contactlessly transmitted from the stationary part, that is to say the machine carrier of the wind power installation, to the rotating part, the rotor unit head.
- the ac voltage induced in the rotor 6 is fed on the one hand to a rectifier 8 which rectifies that ac voltage and the pole wheel 7 of the electromagnetically excited synchronous generator of the wind power installation.
- the rectifier 8 thus has an inductive load and the voltage acting at the pole wheel 7 is the effective root-mean-square value of the voltage.
- the inverter 1 regulates the output voltage in such a way that the effective voltage at the output of the rectifier 1 causes the desired direct current for the pole wheel 7 to flow. In that situation the high inductance of the pole wheel 7 smoothes the current and evens out the waviness of the output voltage of the rectifier 8 .
- the Inverter 1 produces high voltages for a short time, they are compensated by the inductance of the pole wheel 7 if thereafter a lower voltage is produced. It is therefore possible with the asynchronous machine 4 In conjunction with the rectifier 8 to produce a regulated direct current for the pole wheel 7 .
- the amplitude of the exciter current for the pole wheel 7 should in that case be regulated in dependence on the rotary speed and the electrical power of the synchronous generator by the inverter 1 .
- the ac voltage induced in the rotor 6 can also be used for further purposes on the rotating part of the wind power installation.
- a rotor blade adjustment unit 10 requires a dc voltage. That dc voltage is produced from the ac voltage of the rotor 6 by a rectifier 11 . That dc voltage is dependent on the amplitude of the output voltage of the rotor 6 as that involves peak value rectification.
- the capacitors 12 are always charged up. In that respect the capacitance of the capacitors 12 is such that the stored amount of current is sufficient to actuate the rotor blade adjustment unit 10 of each rotor blade in the event of a power failure, in order to be able to securely implement emergency shut-down of the wind power installation and rotation of the rotor blades 13 into the feathered position.
- the transmitter 4 which is in the form of an asynchronous machine therefore contactlessly delivers electrical power to the rotating part of the wind power installation, and that on the one hand supplies the pole wheel of the generator with a direct current and on the other hand also supplies further electrical units such as the rotor blade adjustment unit with a dc voltage.
- the inverter 1 periodically produces a voltage pulse which repeatedly charges up the capacitors 12 to the peak value.
- Such a voltage configuration in respect of the output voltage of the inverter 1 is shown in FIG. 2 . It is possible to clearly see the periodic voltage pulses P for charging up the capacitors 12 to the required voltage. It has also been found however that those peaks are not required but that the capacitors can also be charged up without those peaks to a sufficiently high voltage to actuate the blade adjustment drive means.
- the asynchronous machine 4 is preferably operated at a frequency of about 500 Hz and has an air gap from the primary winding to the secondary winding. Those two conditions require a very high reactive current requirement.
- the LC filter 3 is intended to produce that high reactive current.
- the pole wheel 7 which is connected on the output side of the rectifier 8 also requires a very high reactive current. It comprises in part the fundamental oscillation and the harmonics such as for example the fifth, seventh, eleventh and thirteenth harmonics.
- the LC filter 9 comprising three star-connected branches each with a series circuit comprising a capacitor and a parallel circuit comprising a resistor and an inductor are intended to deliver that reactive power. Overall the level of efficiency of power transmission is enormously improved by the two filters 3 and 9 .
- the solution according to the invention can thus easily provide for contactlessly transmitting power from the non-rotating part of the wind power installation to the rotating part for different purposes. In that respect neither wear nor severe noise generation occurs.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Eletrric Generators (AREA)
- Wind Motors (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10153644A DE10153644C2 (de) | 2001-10-31 | 2001-10-31 | Windenergieanlage mit berührungsloser Energieübertragung auf den Rotor |
DE10153644.5 | 2001-10-31 | ||
PCT/EP2002/009864 WO2003038990A1 (de) | 2001-10-31 | 2002-09-04 | Windenergieanlage mit berührungslosen energieübertragungsmitteln auf den rotor |
Publications (2)
Publication Number | Publication Date |
---|---|
US20050046194A1 US20050046194A1 (en) | 2005-03-03 |
US7098551B2 true US7098551B2 (en) | 2006-08-29 |
Family
ID=7704278
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/493,798 Expired - Lifetime US7098551B2 (en) | 2001-10-31 | 2002-09-04 | Wind power installation with contactless power transmitter |
Country Status (18)
Country | Link |
---|---|
US (1) | US7098551B2 (es) |
EP (1) | EP1442516B1 (es) |
JP (2) | JP4231410B2 (es) |
KR (1) | KR100604431B1 (es) |
CN (1) | CN1582526A (es) |
AR (1) | AR037149A1 (es) |
AT (1) | ATE557468T1 (es) |
AU (1) | AU2002339483B2 (es) |
BR (1) | BR0213849B1 (es) |
CA (1) | CA2464985C (es) |
CY (1) | CY1112789T1 (es) |
DE (1) | DE10153644C2 (es) |
DK (1) | DK1442516T3 (es) |
ES (1) | ES2385555T3 (es) |
NZ (1) | NZ532744A (es) |
PL (1) | PL369060A1 (es) |
PT (1) | PT1442516E (es) |
WO (1) | WO2003038990A1 (es) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070029977A1 (en) * | 2005-08-03 | 2007-02-08 | Denso Corporation | Electric generation control apparatus for vehicle alternator |
US8723402B2 (en) | 2012-07-30 | 2014-05-13 | Boudler Wind Power, Inc. | Structure for an electromagnetic machine having compression and tension members |
US8736133B1 (en) | 2013-03-14 | 2014-05-27 | Boulder Wind Power, Inc. | Methods and apparatus for overlapping windings |
US8823241B2 (en) | 2009-01-16 | 2014-09-02 | Boulder Wind Power, Inc. | Segmented stator for an axial field device |
US9154024B2 (en) | 2010-06-02 | 2015-10-06 | Boulder Wind Power, Inc. | Systems and methods for improved direct drive generators |
US10177620B2 (en) | 2014-05-05 | 2019-01-08 | Boulder Wind Power, Inc. | Methods and apparatus for segmenting a machine |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004024563B4 (de) | 2004-05-18 | 2008-01-10 | Nordex Energy Gmbh | Verfahren zur Erzeugung von Notstrom für eine Windenergieanlage mit einem Hilfsgenerator |
WO2009008863A1 (en) * | 2007-07-12 | 2009-01-15 | Mls Electrosystem Llc | Method and apparatus for grid loss ride-through for wind turbine pitch control system |
EP2205862A2 (de) * | 2007-10-15 | 2010-07-14 | Suzion Energy GmbH | Windenergieanlage mit erhöhtem überspannungsschutz |
DE102009020503B4 (de) * | 2008-06-17 | 2013-03-14 | Sew-Eurodrive Gmbh & Co. Kg | Maschine zur Umwandlung von Strömungsenergie |
US8125094B2 (en) * | 2009-01-30 | 2012-02-28 | Illinois Tool Works Inc. | Engine-driven generator speed control system and method |
DE102009017027A1 (de) * | 2009-04-14 | 2010-12-23 | Siemens Aktiengesellschaft | Windenergieanlage und Energieübertragungseinrichtung für eine Windenergieanlage |
NZ588159A (en) | 2010-09-23 | 2014-01-31 | Powerbyproxi Ltd | A contactless power transfer system |
ITTO20111113A1 (it) | 2011-12-05 | 2013-06-06 | Wilic Sarl | Impianto eolico per la generazione di energia elettrica |
US20130147201A1 (en) * | 2011-12-13 | 2013-06-13 | Robert Roesner | Contactless power transfer device and method |
JP6101499B2 (ja) * | 2013-01-31 | 2017-03-22 | 古河電気工業株式会社 | 風力発電装置 |
JP2015140726A (ja) * | 2014-01-29 | 2015-08-03 | ナブテスコ株式会社 | ピッチ駆動装置 |
KR20200063594A (ko) | 2018-11-28 | 2020-06-05 | 한국전력공사 | 무동력 공기 흡출 비접촉 발전 시스템 |
CN110994896A (zh) * | 2019-12-20 | 2020-04-10 | 上海致远绿色能源股份有限公司 | 一种风力发电机变桨系统用的供电装置 |
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DE2258284A1 (de) * | 1972-11-29 | 1974-06-06 | Himmelwerk Ag | Synchron-generator mit wechselstrominduktionswandler |
US3930175A (en) * | 1973-09-10 | 1975-12-30 | Garrett Corp | Dynamoelectric machine |
US4015189A (en) | 1976-03-15 | 1977-03-29 | Westinghouse Electric Corporation | Supplemental field excitation for permanent magnet rotor of pilot exciter |
US4121148A (en) * | 1976-04-27 | 1978-10-17 | Dipl.-Ing. Hitzinger & Co. | Brushless synchronous generator system |
EP0348938A1 (de) * | 1988-07-01 | 1990-01-03 | Loher Aktiengesellschaft | Ein Netz und Verbraucher versorgende Stromerzeugungsanlage |
US5083039A (en) * | 1991-02-01 | 1992-01-21 | U.S. Windpower, Inc. | Variable speed wind turbine |
US5418446A (en) * | 1993-05-10 | 1995-05-23 | Hallidy; William M. | Variable speed constant frequency synchronous electric power generating system and method of using same |
US5598091A (en) * | 1994-08-11 | 1997-01-28 | Satake Corporation | Three-phase brushless self-excited synchronous generator with no rotor exciting windings |
DE19637146A1 (de) | 1996-08-30 | 1998-03-05 | Holger Kranert | Gondelpropelleranlage Contrapod |
DE19644705A1 (de) | 1996-10-28 | 1998-04-30 | Preussag Ag | Vorrichtung zur Verstellung von Rotorblättern |
US5770909A (en) | 1996-12-13 | 1998-06-23 | Rosen Motors, L.P. | Wound rotor synchronous motor-generator and field control system therefor |
DE19801803A1 (de) | 1998-01-19 | 1999-04-29 | Siemens Ag | Elektrische Rotationsmaschine und Verfahren zur Übertragung elektrischer Leistung |
DE19920504A1 (de) | 1998-11-26 | 2000-06-08 | Aloys Wobben | Azimutantrieb für Windenergieanlagen |
US6188204B1 (en) * | 1999-08-05 | 2001-02-13 | Joseph Vithayathil | Brushless AC field system for stable frequency variable speed alternators |
US6256212B1 (en) * | 1997-11-03 | 2001-07-03 | Aloys Wobben | Pulse-controlled inverter with variable operating sequence and wind power plant having such an inverter |
DE10009472A1 (de) | 2000-02-28 | 2001-09-27 | Frisia Steuerungen Gmbh | Vorrichtung zum Verstellen der Anstellwinkel der auf einer Nabe einer Rotorwelle verdrehbar angeordneten Rotorblätter einer Windkraftanlage |
DE10127102A1 (de) | 2001-06-02 | 2002-12-12 | Aloys Wobben | Asynchronmaschine und eine Windenergieanlage hiermit |
US6624617B2 (en) * | 2001-04-20 | 2003-09-23 | Walter Holzer | Apparatus and method for stabilizing the voltage of an AC generator with variable rotor speed |
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2001
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-
2002
- 2002-09-04 BR BRPI0213849-2A patent/BR0213849B1/pt not_active IP Right Cessation
- 2002-09-04 AU AU2002339483A patent/AU2002339483B2/en not_active Ceased
- 2002-09-04 PL PL02369060A patent/PL369060A1/xx not_active Application Discontinuation
- 2002-09-04 CN CNA028218345A patent/CN1582526A/zh active Pending
- 2002-09-04 JP JP2003541130A patent/JP4231410B2/ja not_active Expired - Fee Related
- 2002-09-04 CA CA2464985A patent/CA2464985C/en not_active Expired - Fee Related
- 2002-09-04 WO PCT/EP2002/009864 patent/WO2003038990A1/de active IP Right Grant
- 2002-09-04 ES ES02776979T patent/ES2385555T3/es not_active Expired - Lifetime
- 2002-09-04 US US10/493,798 patent/US7098551B2/en not_active Expired - Lifetime
- 2002-09-04 PT PT02776979T patent/PT1442516E/pt unknown
- 2002-09-04 AT AT02776979T patent/ATE557468T1/de active
- 2002-09-04 EP EP02776979A patent/EP1442516B1/de not_active Expired - Lifetime
- 2002-09-04 KR KR1020047006408A patent/KR100604431B1/ko active IP Right Grant
- 2002-09-04 DK DK02776979.3T patent/DK1442516T3/da active
- 2002-09-04 NZ NZ532744A patent/NZ532744A/en not_active IP Right Cessation
- 2002-10-30 AR ARP020104115A patent/AR037149A1/es not_active Application Discontinuation
-
2008
- 2008-09-12 JP JP2008234349A patent/JP4759032B2/ja not_active Expired - Fee Related
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2012
- 2012-05-25 CY CY20121100479T patent/CY1112789T1/el unknown
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Publication number | Priority date | Publication date | Assignee | Title |
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US2891211A (en) | 1956-01-11 | 1959-06-16 | Gen Electric Co Ltd | Electric supply arrangements |
DE2258284A1 (de) * | 1972-11-29 | 1974-06-06 | Himmelwerk Ag | Synchron-generator mit wechselstrominduktionswandler |
US3930175A (en) * | 1973-09-10 | 1975-12-30 | Garrett Corp | Dynamoelectric machine |
US4015189A (en) | 1976-03-15 | 1977-03-29 | Westinghouse Electric Corporation | Supplemental field excitation for permanent magnet rotor of pilot exciter |
US4121148A (en) * | 1976-04-27 | 1978-10-17 | Dipl.-Ing. Hitzinger & Co. | Brushless synchronous generator system |
EP0348938A1 (de) * | 1988-07-01 | 1990-01-03 | Loher Aktiengesellschaft | Ein Netz und Verbraucher versorgende Stromerzeugungsanlage |
US5083039B1 (en) * | 1991-02-01 | 1999-11-16 | Zond Energy Systems Inc | Variable speed wind turbine |
US5083039A (en) * | 1991-02-01 | 1992-01-21 | U.S. Windpower, Inc. | Variable speed wind turbine |
US5418446A (en) * | 1993-05-10 | 1995-05-23 | Hallidy; William M. | Variable speed constant frequency synchronous electric power generating system and method of using same |
US5598091A (en) * | 1994-08-11 | 1997-01-28 | Satake Corporation | Three-phase brushless self-excited synchronous generator with no rotor exciting windings |
US6906447B2 (en) * | 1996-05-29 | 2005-06-14 | Abb Ab | Rotating asynchronous converter and a generator device |
DE19637146A1 (de) | 1996-08-30 | 1998-03-05 | Holger Kranert | Gondelpropelleranlage Contrapod |
DE19644705A1 (de) | 1996-10-28 | 1998-04-30 | Preussag Ag | Vorrichtung zur Verstellung von Rotorblättern |
US5770909A (en) | 1996-12-13 | 1998-06-23 | Rosen Motors, L.P. | Wound rotor synchronous motor-generator and field control system therefor |
US6256212B1 (en) * | 1997-11-03 | 2001-07-03 | Aloys Wobben | Pulse-controlled inverter with variable operating sequence and wind power plant having such an inverter |
DE19801803A1 (de) | 1998-01-19 | 1999-04-29 | Siemens Ag | Elektrische Rotationsmaschine und Verfahren zur Übertragung elektrischer Leistung |
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US6188204B1 (en) * | 1999-08-05 | 2001-02-13 | Joseph Vithayathil | Brushless AC field system for stable frequency variable speed alternators |
DE10009472A1 (de) | 2000-02-28 | 2001-09-27 | Frisia Steuerungen Gmbh | Vorrichtung zum Verstellen der Anstellwinkel der auf einer Nabe einer Rotorwelle verdrehbar angeordneten Rotorblätter einer Windkraftanlage |
US6624617B2 (en) * | 2001-04-20 | 2003-09-23 | Walter Holzer | Apparatus and method for stabilizing the voltage of an AC generator with variable rotor speed |
DE10127102A1 (de) | 2001-06-02 | 2002-12-12 | Aloys Wobben | Asynchronmaschine und eine Windenergieanlage hiermit |
US6724099B2 (en) * | 2001-08-24 | 2004-04-20 | Siemens Aktiengesellschaft | Method and apparatus for starting up a turboset |
EP1426616A1 (de) * | 2002-12-05 | 2004-06-09 | RWE Piller GmbH | Netzkopplung einer Windkraftanlage |
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US20070188152A1 (en) * | 2005-08-03 | 2007-08-16 | Denso Corporation | Electric generation control apparatus for vehicle alternator |
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US7292008B2 (en) * | 2005-08-03 | 2007-11-06 | Denso Corporation | Electric generation control apparatus for vehicle alternator |
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US9154024B2 (en) | 2010-06-02 | 2015-10-06 | Boulder Wind Power, Inc. | Systems and methods for improved direct drive generators |
US8723402B2 (en) | 2012-07-30 | 2014-05-13 | Boudler Wind Power, Inc. | Structure for an electromagnetic machine having compression and tension members |
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US10574107B2 (en) | 2014-05-05 | 2020-02-25 | Bwp Group | Methods and apparatus for segmented machines having mechanically and electrically removable machine segments |
Also Published As
Publication number | Publication date |
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DK1442516T3 (da) | 2012-07-30 |
DE10153644C2 (de) | 2003-11-20 |
CA2464985A1 (en) | 2003-05-08 |
PL369060A1 (en) | 2005-04-18 |
BR0213849A (pt) | 2004-08-31 |
CY1112789T1 (el) | 2016-02-10 |
US20050046194A1 (en) | 2005-03-03 |
KR20050025129A (ko) | 2005-03-11 |
CA2464985C (en) | 2010-04-13 |
AU2002339483B2 (en) | 2005-05-05 |
EP1442516B1 (de) | 2012-05-09 |
JP4759032B2 (ja) | 2011-08-31 |
AR037149A1 (es) | 2004-10-27 |
JP2009065829A (ja) | 2009-03-26 |
JP4231410B2 (ja) | 2009-02-25 |
WO2003038990A1 (de) | 2003-05-08 |
JP2005507630A (ja) | 2005-03-17 |
KR100604431B1 (ko) | 2006-07-25 |
PT1442516E (pt) | 2012-07-12 |
DE10153644A1 (de) | 2003-05-22 |
ES2385555T3 (es) | 2012-07-26 |
NZ532744A (en) | 2005-12-23 |
EP1442516A1 (de) | 2004-08-04 |
CN1582526A (zh) | 2005-02-16 |
ATE557468T1 (de) | 2012-05-15 |
BR0213849B1 (pt) | 2014-08-19 |
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